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    <script>
        1 + "1"

        2 * "2"

        [1, 2] + [2, 1]

        "a" + + "b"
        let cc = { a: { b: 1, c: 2, d: [1, 2] }, d: 3 }
        let { a: { b, d } } = cc
        console.log(b)
        console.log(d)
        let data = {
            name: 'ddd',
            type: 'ttt',
            impl:[{eng:'sss',ver:1.7},{ee:'aaa',vv:'vvv'}]
        }
        let {impl:[{eng},{ee}]}=data
        console.log(eng)
    </script>
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